The Lewis and Clark County Sheriff’s Office, the FBI, Montana Highway Patrol, Helena Police Department, and the ATF are on scene. Officials have not released any details about the device, or why it was placed on the playground. There was no threat made against the school prior to the explosion.

The device did not cause any damage to playground. Authorities described the device as a soda bottle with duct tape wrapped around it, but did not say what was inside it.